Definition of species is an interesting debate. Please allow this article to help you follow your point to fruition?

"The key changes are not in bits of DNA that humans acquired as theyevolved–extra genes that we have but chimps and other animals donot–but in chunks of DNA that we lost. What’s more, the chunks inquestion are not even genes at all, but sequences of DNA that lie inbetween genes and act as switches, orchestrating when and wherespecific genes are turned on and off through the course of ananimal’s development."